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1987 Buick Riviera Luxury 3.8L Excessive EmissionsVIN: 1G4EZ1139Hhi all, need a little info on this one.car has a code 55
ecm failure.michell has no info other than "replace ecm"did
that and no help.car came in for failed emission.hc failed
i know i can fix this emission problem with cat convertor.
car has fuel control and ... Trouble codes: 55 (ecm failure)

1987 Buick Century Limited 3.8L No StartVIN: 1G4AL5139HI have spark, fuel pressure, injector pulse and good crank
signal. ECM does not show rpm change while cranking, it
stays at 0. I can scope signal going into ecm at ppl/wht
wire and looks fine. I can view data with scanner and see
maf values change while cranki...

1994 Buick LeSabre Custom 3.8L Stall, Poor Fuel EconomyVIN: 1G4HP52L22this is for a different shop so i will apologize for lack
of information this car will die while driving and when you
try to restart it it seems like it is flooded you hold the
accelator to the floor and it will refire and then clear up
no specific time for it...

1996 Buick Century Custom 3.1L Poor Idle QualityVIN: 1G4AG55M3THi all of you out there I have one that is making me pull
my hair out hear this Buick when you start the car it will
idle up and then down to around 700 Rpm with a iac count of
29 to 30 but if you put it in gear or turn ac on Idle will
go up and and not back d...

1996 Buick Skylark Custom 3.1L Theft systemVIN: 1G4NJ52M3THi Guys I'm sure someone has run accross this. The car will
start sometimes and not others. Have performed key learn
procedure multiple times. Sometimes Theft light is not
illuminated at all. Not even at prove out. Code 1629 stored
in memory haven't had much l...

2002 Buick LeSabre Custom 3.8L MisfireVIN: 1G4HP54K92This is a first time post for me. Any help would be greatly
appreciated. Vehicle came into our shop from the dealer
which was diagnosed as a valve problem. The customers
complaint is a rough idle. No misfire can be felt on
acceleration or when cruising. Found ... Trouble codes: P0300, P0301

2000 Cadillac Seville STS 4.6L AlternatorVIN: 1G6KY5490YVehicle quit going down the road. Battery waas dead. We
charged battery and found alternator was not charging. Only
code was low battery voltage. The diagnostic we found
stated that if you had 12 volts at the alternator output, a
good case ground and either 5,...

1981 Chevrolet C10 Custom 4.1L liftersVIN: 2GCEC14D6BWhen first started the truck runs good (for as many miles).
The longer it runs, the lifters on a couple cylinders
(particularly #1 & #2) start to clatter, eventually to
where it misfires & runs like crap. Let her sit for a while
& fire it up & it runs good aga...

1981 Chevrolet Corvette 5.7L door locksVIN: 1G1AY8769BThis is the 1/4 mile drag car that I asked for a vacuum
diagram on an earlier post ...I am putting every thing back
to stock to make it road ready...I am all most done with
this project all I have left is getting the power door
locks to work , I have no power ...

1991 Chevrolet V3500 Silverado 7.4L transmissionVIN: 1GCHV33N3MHi guys and girls.I need help fast from all the GM trans
techs.I am planning an engine swap in my own truck.I will
be removing the gas hungry 454 and putting in a non turbo
1994 6.5 gm diesel with a mechanical inj pump.Now I have
been told that I have to use t...

1994 Chevrolet Cavalier Z24 3.1L MisfireVIN: 1G1JF34T2RThank you all for your help in advance. This is my wife's
car, so I'm in trouble. This has been going on for several
months now. She will be driving at almost any speed, and
will experience a set of misfires for about 5-10 seconds,
then it goes away. Sometimes...

1996 Chevrolet S10 2.2L No StartVIN: 1GCCS1448Tthis truck has no spark, and no injector pulse. it will not
comunicate with scaner and the check engine light comes on
for a split second and gose out.what could make the ses
light come on and go out so quikly. cam and crank signals
are good. i have unpluged e...

1996 Chevrolet Camaro 3.8L Poor Idle Quality, Surge, Cuts out, StallVIN: 2G1FRP22K1this car will run good cts reads normal up to about 226
degrees tyhen all of sudden it will jump straight to 287 to
300 deegrees and starts running bad, idle surge and
stalling. then cts will go back to normal reading. and run
great. customer stats that there ...

1998 Chevrolet Venture 3.4L No StartVIN: 1GNDX03E3Wvehicle towed from other shop not running, ckd fuel
pressure within factory spec, checked for spark good,
checked for injector pulse as best as we could with out
removing intake none detected. spray combustable in intake
engine will run.
check modis trouble s...

1999 Chevrolet K1500 Suburban 5.7L MisfireVIN: 1GBFK16RXXThis 99 Suburban came in wanting plugs to solve a missfire
at idle. i insatalled the plugs and noticed number four had
some build up on it. but it did not solve missfire. # four
cylinder misses at idle only. It has great acceleration and
runs great off idle. I... Trouble codes: P0304

2000 Chevrolet Blazer LS 4.3L Leaking fuelVIN: 1GNDT13W6YThanks for looking . This Blazer will leak raw fuel from
the canister vent solenoid when parked in the sun for an
extended period of time . Customer swears that she doesn't
overfill the tank , but it happens soon after fill up . Not
fully understanding the ven...

2002 Chevrolet Tahoe LS 5.3L courtesy lightsVIN: 1GNEK13Z92customer complains of the interior lights not coming on
when door handle is pulled.in fact they dont when the door
is locked. they do come on when door is open. also the head
lamp switch gets too hot to handle after the head lamps
have been on for some time. t...

2003 Chevrolet Tahoe LS 5.3L Battery drainedVIN: 1GNEK13293Truck came to shop with dead battery, customer said battery
dies after one dday or three days of sitting, had battery
installed at other shop. I tested the charging system and
battery draw with a amp meter. charging system ok and
battery draw is 0 amps. I swit...

1982 GMC C2500 6.2L glow plugVIN: 2GTFC24C2CI hope someone has a miracle for me. I just replaced a tank
& sender, breaking the budjet on this worthless truck. Now
I have to put glow plugs in it & had the tip of one break
off & fall in. About 7/16 or 1/2" of it. I REALLY don't
want to pull the head. Any ...

1998 GMC Sonoma SLE 2.2L MisfireVIN: 1GTCS1945WTruck came in for chuggs on accel I test drove and all
seemed ok at first then noticed when taking off especially
when in second or third light to medium throttle would miss
and buck once or twice but sometimes not at all. No miss
under hard accel or heavy loa...

1929 Oldsmobile roadster 196CID MechanicalVIN: 1070931011Dear friends, I have in my shop a old olds, 29Žand the
engine is incomplete, I need to kowm about diagram of oil
pump,shaft distributor and pressure system.The engine is a
6 cilinder,(195 CID).Thanks a lot

1997 Saturn SL1 1.9L Cooling systemVIN: 1G8ZH5288VThis Saturn was left here. OIl is getting into the cooling
system some how. Pressure testing the ccoling system
overnight revealed nothing. It is not transmission fluid
some one else said that was the problem and replaced
radiator to no avail. Color of coolant...

2001 Saturn L300 3.0L coolantVIN: 1G8JW52K01this car came in with complaint of oil in the coolant,
brown milky looking stuff. the customer had been dealing
with this for some time now and had changed radiators
twice, thinking the tranny cooler was the culprit leaking
trans fluid into the coolant, they f...

1955 Cadillac Sedan 390CID r12VIN: 5562120017Thanks for all your help. 6lbs of R-12.. W/sight glass,
Great imput on the vacumme control eating freon -Would not
of thought of that, been awhile since I used a propane leak
tester..But I Recall A Whiff or two of the gas put off by
it.. Thanks all! Andy

1994 Cadillac DeVille Concours 4.6L UnknownVIN: 1G6KF52YIRAll replies to this situation indicated that the problem
was internal to the transaxle or its harness. If the
harness checked out ok the only repair would be an overhaul
of the transaxle. There is no way to check the harness
without almost removing the transax...

1997 Cadillac Eldorado 4.6L oil pressure lightVIN: 1G6EL12Y5VThank you for all the help from the IATN members that
offered help on this vehicle. I have found a broken wire
(black) in the wiring harness close to the oil pressure
switch. I put in a new pigtail harness connecting to the
oil switch and all is well! Thanks a...

2000 Chevrolet Blazer LS 4.3L 4wdVIN: 1GNDT13W1YHello. I have not been able to relook at this Blazer since
my first post. The cust took it and said they did not have
the funds to look at it now but will bring it back when
winter starts again. I did notice though before I let it go
that if you let it sit for...

2002 Chevrolet Trailblazer LS 4.2L Transfer CaseVIN: 1GNDT13SX2I believe that the problem is in the transfer case, had
dirty oil with debris, but am still waiting for a go ahead
to take it apart. Thanks for all the replies, they were
very helpful

1994 GMC Olympia 5.0L coVIN: 1RC9408367Thank you everyone for your help, Michael from Oklahoma and
Ronald from Michigan had some very helpful tips. The base
timing was at 6 degrees and I set it at TDC (according to
the book) and set the idle at 500D (according to the book).
Now I'm getting a IAC re...